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Suppose prior elections in Louisiana indicated it is necessary for a candidate for governor to receive at least 80 percent of the vote in the northern part of the state to be elected. The incumbent governor is interested in assessing his chances of returning to office and conducts a survey of 2,000 registered voters residing in the northern part of the state. The random sample finds that 75% willing to vote for the governor. His campaign manager says, "Don't worry! This is not an significantly less percentage." The governor calls you, as he knows you are a statistical wizard and asks if he can be 95% sure that he is within striking distance.
Carry out the suitable hypothesis test, at alpha = .05, to find out whether there is a relationship between school/work and stress.
A random sample of 51 observations was selected from a normally distributed population. The sample mean was x = 88.6 , and the sample variance was s2 = 38.2.
Crystal Ball requires the following steps:
Calculate P value? Calculate critical value?
In terms of measures of association, how is Lambda different from the other measures used for nominal level data?
Calculate the correlation between decorating and Christmas enjoyment - Maximize Wayne's studying effectiveness.
What is the percentage of variation in the dependent variable explained by the variation in the independent variable.
Prepare a 95% confidence interval for the average grocery bill. Would a 99% confidence interval be narrower or wider than the 95% confidence interval?
Supposing that the entire $10,000 can be spent on tires (ignoring other costs), and that the true fraction that will fail is approximately .05, can NHTSA attain its goal while staying within the budget? Describe.
Assume the least squares equation is Y' = 10 + 20X. What does the value of 20 indicate?
How does a linear regression allow us to better estimate trends, costs, and other factors in complex situations?
Do not forget to test for any applicable difference in means (Tukey implies).
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